1987 isuzu: 000 miles..rebuild..noise from front end of motor..revved

Customer Question

i have a 1987 isuzu pup 1.9l motor with about 30,000 miles on major rebuild (local carquest shop). ratteling noise from front end of motor when its warm and revved up a bit. motor runs fine. noise goes away if you shut the motor off. rev it up and it starts making the noise again i pulled the valve cover to look at the timing chain and it looks ok to me. there is a small pin sticking out the tensioner shaft that i couldnt move. i dont know if that is normal. all the valve springs look ok. some of the rocker ( tappets)shaft nuts were loose and i tightened them up but it made no difference. i also loosened the altenator and air pump so they were not spinning as well the water pump and still made the noise. i can't find anything obvious. any advice would be appreciated

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